I'm co-founder of Missive [1], mentioned in the post. If any of you have questions, I would be happy to answer them.
Disclosure: Missive is a Canny customer, Canny is Missive customer
We love Canny at Missive! If curious how we use it checkout our Canny board: https://missive.canny.io
And an example of users interacting with us on feature development through it: https://missive.canny.io/feature-requests/p/dedicated-team-i...